diff --git a/.github/workflows/build-crate.yml b/.github/workflows/build-crate.yml
index 88c3b5be..a417f17d 100644
--- a/.github/workflows/build-crate.yml
+++ b/.github/workflows/build-crate.yml
@@ -93,6 +93,7 @@ jobs:
       uses: alire-project/setup-alire@v1
       with:
         toolchain: --disable-assistant # We want to use the external ones in this workflow
+        version: 1.2.1
 
     - name: Set up devel `alr`
       if: contains(github.base_ref, 'devel-')
diff --git a/.github/workflows/build-native.yml b/.github/workflows/build-native.yml
index d0fa816d..89dba17b 100644
--- a/.github/workflows/build-native.yml
+++ b/.github/workflows/build-native.yml
@@ -63,6 +63,8 @@ jobs:
     - name: Set up stable `alr`
       if: contains(github.base_ref, 'stable-')
       uses: alire-project/setup-alire@v1
+      with:
+        version: 1.2.1
 
     # By default, this sets up the newest indexed native toolchain
     - name: Set up devel `alr`
diff --git a/.github/workflows/diff-release.yml b/.github/workflows/diff-release.yml
index 48e958ba..fb825062 100644
--- a/.github/workflows/diff-release.yml
+++ b/.github/workflows/diff-release.yml
@@ -41,6 +41,7 @@ jobs:
       uses: alire-project/setup-alire@v1
       with:
         toolchain: --disable-assistant # We don't need the compiler
+        version: 1.2.1
 
     - name: Set up GNAT toolchain (FSF)
       if: (matrix.os == 'ubuntu-latest') && (contains(github.base_ref, 'devel-'))
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4efdb082..c5922104 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -2,7 +2,7 @@ name: Check PR
 on: pull_request
 jobs:
   build:
-    runs-on: ubuntu-latest    
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
 
@@ -13,6 +13,8 @@ jobs:
     - name: Set up stable `alr`
       if: contains(github.base_ref, 'stable-')
       uses: alire-project/setup-alire@v1
+      with:
+        version: 1.2.1
 
     - name: Set up GNAT for devel `alr`
       if: contains(github.base_ref, 'devel-')
@@ -33,6 +35,6 @@ jobs:
     # Check index contents for unknown config variables
     - run: alr index --check
 
-    - run: alr index --update-all 
+    - run: alr index --update-all
 
     - run: alr search --crates